Mechanical calculating device.



PATENTED AUG. 9, 1904.

A. W. STEELE. MECHANICAL CALCULATING DEVICE.

APPLIOATION FILED HA3. 7. 1904.

4 SHEETS-SHEET 1.

I0 IODEL.

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No. 767,181. PATENTED AUG. 9, 1904.

A. W. STEELE. MECHANICAL GALGULATING DEVICE.

. APPLICATION IILEID MAB.- 7. 1904.

K0 MODEL.

No. 767,181. PATENTED AUG. 9, 1904 A. W. STEELE.

MECHANICAL CALCULATING DEVICE.

APPLICATION FILED MAR. 7. 1904. N0 MODEL.

4 SHEETS-SHEET 3.

IMI film/MIMI! aa ggamlaa 3 A 0 9 l 9 G U A D E T N E T A P F L B E T SW A L 8 1 n0v 7 m N MECHANICAL CALCULATING DEVICE.

APPLICATION FILED MAE. 7, 1904.

. 4 SHEETS-SHEET 4.

NO MODEL.

' QWMW Patented August 9, 19M.

PATENT CrricE.

ALEXANDER TV. STEELE, OF SALT LAKE CITY, UTAH.

MECHANICAL CALCULATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 767,181, dated August9, 1904.

Application filed March '7, 1904. Serial No.196,922. (N0 model.)

To all wit/m2 it may concern.-

Be it knownthatI, ALEXANDER TV. STEELE, a citizen of the United States,residing at Salt Lake City, in the county of Salt Lake, State of Utah,have invented certain new and useful Improvements in MechanicalCalculating Devices, of which the following is a description, referencebeing had to the accompanying drawings and to the letters of referencemarked thereon.

My invention relates to a device for mechanically calculating, and isespecially adapted to figuring salaries and wages of employees forpartial periods where they are paid by the hour, the day, the week, orthe month.

The object of this invention is to furnish an improved device forobtaining the results without the labor of making the calculation bydivision, multiplication, and addition, and which shall be simple inconstruction, convenient in use, and accurate in results. The invention,however, is not to be limited to the particular embodiment shown anddescribed, but is open to such changes and modifications as may fallwithin the scope of the claims.

The above object 1 accomplish by the construction illustrated in theaccompanying drawings, in which Figure l is aplan of the improvedcalculator arranged for calculating the per diem salaries or Wages atrates of from ten dollars to one hundred and twenty-five dollars permonth for months with thirty-one days. Fig. 1 is a detail sectional viewon line 1 1, Fig. 1'. Fig. 2 is a similar view with the columns arrangedfor calculating the per diem salaries or wages for months having thirtydays and months having thirty-one days. Fig. 3 is a similar view withthe columns arranged for calculating the wages paid by the day andfractional parts thereof. Fig. 4 is a similar view of the calculatorarranged for calculating wages paid by the hour.

A designates in the several figures the board, formed of any suitablematerial and provided with vertically disposed concentric curved lines Aintersected by transversely-disposed lines A which are at an angle tothe radius of the lines A, the lines A radiating from a common centerwhich is a considerable d1stance below the center from which the arcs Aare drawn. Thus columns of spaces are formed in which the tables C arearranged. This arrangement of the lines A affords a greater space at theleft-hand side than would be the case were the lines A disposed radiallyto the center from which the curved lines or arcs A are drawn, and,moreover, the spaces between the lines A do not increase in height fromleft to right, as they would were radial lines employed. In the presentcase the lines A are more nearly parallel, so far as the portions ofthem lying within the space between the outer and inner arcs A areconcerned, than would be lines radiating from the center from which thearcs A are drawn.

B designates the indicating-arm pivoted at one end to the left side ofthe board, so as to sweep across the board and the tables producedthereon. The indicating-arm B is pivoted to the board at the center,from which the arcs A are drawn, and its upper side is cut away at anangle from B to B to form a straight edge B at an angle to itslongitudinal axis and adapted to approximately register with every lineA". The indicating-arm is provided to the left of the table C with anantifriction-roller B of some kind to lift the arm from the board, sothat it will not contact with and rub the table and will move easily andwithout noise. hen the indicating-arm B is at its lowestpoint, theroller B will drop into a recess or depression m in the board and thelower edge of the arm will pass under a catch a, secured to the board.

The columns of figures E E at the right and left designate the number ofdays or hours to be calculated, and the indicator is provided withopenings or notches 7) at the ends of its straight edge to register withthe corresponding numerals of said two columns. Of course there may beany number of columns and tables, according to the work to be performed.

The blank spaces on the board may have the directions for using thecalculator printed thereon and other useful information. The rulings maybe of different colors and the columns of the table C may be spacedapart by blank spaces to obviate the possibility of error in taking oifthe amounts from the columns. The space F at the lower right-hand cornercontains information as to what tables the board has on it. The spaces Balong the top edge of the indicator B are to receive the varioussalaries in duplicate of the top space A on the board.

The invention is intended to be used to calculate salaries and wagespaid by the year, the month, the week, the day, and the hour. Themonth-board may be used for months of twenty-eight, twenty-nine, thirty,or thirtyone days or for a month of twenty-eight and twenty-nine or formonths of thirty and thirtyone days combined, as shown on Sheet 2, therulings for all boards to be the same and the desired amounts to beprinted in figures thereon, as the case may require.-

The above refers to all the boards in general, and the following willrefer to each board by itself.

The board in Fig. 1 is especially adapted for the calculating salariesfor months with thirty-one days. This board may be filled out with suchsalaries as the case may require, those shown being from ten to onehundred and twenty-five dollars per month, and the rate per day appearsin the columns G.

In Fig. 2 the board is especially adapted for the calculating ofsalaries for months of thirty and thirty-one days combined. Thus thecolumns of tables must necessarily be double for the same salary in thebody of the board, and also the various salaries must be shown in twospaces on the board instead of one. The indicator B is just the same inconstruction, but has two lines of spaces B instead of one, the top lineof spaces for the number of days in the month and the bottom line ofspaces for the various salaries to be used. This board may be filled outwith such salaries as the case may require. This board may be filled outfor twenty-eight and twenty-nine day months also. I

In Fig. 3 the board is especially adapted for calculating wages paid bythe day. The indicating-arm must be ruled with four lines of spacesinstead of two, as in the above. The top or first row of spaces on theindicator is for the various wages to be calculated, and the secondrow-of spaces is for the amounts that equal three-fourths of one day atthe same rate of wages paid per day. The third row of spaces is for theamounts that equal one-half of one day at the same rate of wages paidper day. The fourth row of spaces is for the amounts that equalone-fourth of one day at the same rate of wages paid per day. Thefractional parts of days must be added by scratch memorandum orotherwise to the amount taken off the board for the full days. Thisboard may be filled out with such wages as the case may require.

The board in Fig. 4 is especially adapted for calculating wages paid bythe hour. The l indicating-arm in this case must be ruled same as inFig. 3 and used in same way exactly; but the tables on the board withthis sheet will be calculated by tens instead of units after ten hasbeen reached. In this case two moves must be made for all calculationsthat end in the unit figure l to 9. EX- ample: Sixty-seven hours atforty cents, draw the indicator down to 60, glance across to AW. and youfind on the board $24.00, slide the indicator back up to 7, glance to40. and you find $2.80. Thus sixtyseven hours at forty cents equalstwenty-six dollars and eighty cents. This board may be filled out withsuch wages as the case may require.

The figures on the boards and indicators as presented in the drawingsare only illustrations. Any figures within the scope of salaries andwages are intended to be used.

What I claim is 1. The herein-described calculator comprisingaboardhaving vertically-disposed concentric curved lines or arcs andtransversely-disposed lines intersecting said curved lines at an angleto the radius thereof and drawn from a center below the center fromwhich the concentric curved lines or arcs are drawn, columns of tablesarranged in the spaces formed by said lines, and an indicator pivoted atone end to the board at the center from which the concentric curvedlines or arcs are drawn to swing over the tables and having its upperedge formed at an angle to register with every one of the saidtransversely-disposed lines.

2. Theherein-described calculator comprising a board havingvertically-disposed columns of tables arranged on concentric curvedlines or arcs and the figures of each column arranged on lines radiatingfrom a center below the center of the concentric curved lines or arcs atan angle to the radius of the curved or arc-like columns, and a pivotedindicator to sweep across the tables and having an inclined upper edgeto register with all the transversely-disposed lines of figures.

3. The herein-described calculator compris ing a board havingvertically-disposed columns of tables arranged on concentric curvedlines and the figures in each column arranged on lines at an angle tothe radius of said curved columns, anindicator pivoted to the boardeccentric to the axis of said curved columns, and having an inclinedupper edge for the purpose described, an antifriction device on theindicator to one side of the tables, and a catch on the board to engagethe indicator when not in use; the table having a recess to receive theantifriction device at such time.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER W. STEELE.

Witnesses:

S. H. HUDSON, RoB'r. S. CALDERwooD.

